Type-writing machine.



H. H. STEELE.` TYPE ITING MACHINE.

APPLICATION FILED DEO. 30, 1908.

9149981 meme@ Mar. 2, w09.

2 SHEETS-SHEET 1.

FIGI.

14:5 TTBRNEY y H. H. STEELE.

TYPE WRITING MCHINB.

i INVENTEJR.'

' *HB5 T TURN? ,marras srars Parser-enema.

HERBERT H. STEELE, OF MAROELLUS, NEW YORK, ASSIGNOR TO THE MONAROH TYPE- WRITER COMPANY, OF SYRACUSE, NEW YORK,A CORPORATION OF NEW YORK.

TYPE-ITING MACHINE.

Specification of Letters Patent.

patented Maren a, loos'.

To `all whoml 'it 'may concern:

Be it known that I, HERBERT II. STEELE, citizen of the United States, and resident of Marcellus, in the county of Onondaga and State of New York, have inventedcertain new and useful Improvements in Type- Writing Machines, of which the following is a specification.

My invention relates to carriage feeding devices for typewriting machines and its object is to provide improved devices of the class specified.

To the above and other ends the inven-v tion consists in the features of construction, combinations of devices and arrangements of parts hereinafter described and particularly pointed out in the claims.

I have shown my invention as applied to a Monarch typewriting machine" but the nature of the invention is such that it ma be adapted to other styles of writing machines.

fhen an ordinary feed escapement, that is, an escapement which permits the carriage to advance aletter space during the return stroke ofa printing key, is employed, it has been common heretofore to make use of a back stopA like that shown in the patent to Gabrielson N o. 717,837 granted January 6th, 1903. In some styles of Monarch machines and in other mac `nes, when the vfinal margin' stop has arresed-the carriage it is sometimes desirable to add one more character to complete the Word or to print a hy hen to properly divide syllables of an u nished word. In such case the o eration of the usual margin release key isengages the final margin stop and carriage stop and so releases the escapement rocker, permitting one more character to be printed; but there is no corresponding feeding movement of the carriage at thistime because of the fact thatv another stop on the carriage (the tabulator stop in the present case) has .previously contacted with a stop fixed on the frame of the machine. The result is that the depression of the character key for the last character rocks the dog rocker forward and allows the stepping dog to be pressed by'its spring ast the tooth of the 'escapement wheel wit which said stepping dog had previously been engaged; but the carriage being at this time prevented from moving, thereis nothing to overcome the dog spring and restore the-dog to normal position when the rocker rocks backward. Under these conditions, 'when the carriage is restored from left to right and has been arrested lit will move forward two spaces instead of one onlyas is common with the form of back stop referred to. If the operator fails to thereafter move the carriage back one space an irregular left-hand margin will result. The same trouble may occur if the-'line lock sticks or for some other reason fails to operate properly onv the dog rocker when the final arrest of the carriage 'takes place. To remedy this defect I substitute'for the usual back stop an improvedV back stop which is mounted on the dog rocker' independently of the escapement dogs. In order to prevent the substituted back stop from interfering with the roper operation of the escapement dogs, said back stopis mounted in a novel wayon the dog roc er so that the dog rocker may move at times relatively to the back stop.

In the accompanying drawings, which ,l

illustratdone form of my invention, Figure 1. is a vertical sectional view taken transversel of the carriage and showing the carriage ceding or escapement devices. Fig. 2 is a rear elevation artly insection of the escapement devices 1n their mounting. Fig. 3 is a rear elevation showing certain of the escapement devices, the escapement wheel being shown in dotted lines and a section of art of the dog rocker also being shown.

ig. 4 is a view corresponding to Fig. 3 but illustrating a known form of back stop heretofore employed. Fi 5 is a front elevation of the carriage with t e platen removed, the esca ement devices being omitted and the line ocking devices being shown. Fig. 6 is a view corresponding with Fig. 5 but omitting some of the parts shown in Fig. 5 and illustrating other parts in different relations from those in which they appear in said Fig. 5. Fig. 7 is a verticalsectional view illustrating part of the margin stop releasing mechanism.

The frame of the machine comprises a top plate 1 from which rise standards 2 su porting fixed upper and lower grooved gui e rails 3. The guide rails receive anti-friction balls or rolls 4 which also/cooperate with grooves in the u per and lower faces ofa slide bar 5. Said sli( e bar is comprised in the platen carrier or carriage which also includes end bars 6 extending forward from the slide bar and providing bearings for a rotary platen 7. Arms 8 which are pivoted on the end bars and extend rearward have a feed rack 9 secured to their rear ends. The rack 9 normally meshes with a feed pinion 10 which is xedjto the forward end of a shaft llbearing in a bracket 12 secured to the to plate. Suitably secured to the rear end of t e shaft is a housing'13 on which is pivoted a spring; pressed pawl 14 (Fig. 2), said pawl coperating with a ratchet wheel 15 which is loosely mounted on the shaft 11 and is suitably fixed to a circular' rack or escapement wheel 16 also loose on the shaft 11, said escapement wheel or rack having teeth 17, the working face of each tooth being straight and the o posite face curved. Cooperative with t e teeth of the escapement wheel are escapement dogs 18 and 19 mounted at the top of a vertically disposed arm 29 of a dog carrier or rocker which also comprises a shaft-like'portion 21 and a horizontally disposed arm 22. The forward dog 18 is what is commonly termed a lstepping dog or feed dog, and is movable on the dog carrier or rocker,'being arranged in a slotform'ed in a lateral lug 20a on the 4vertical arm of the rocker and pivoted on a screw 23 which is secured horizontally in said lug. A coiled spring 24 (Fig. 2) is arranged between' the side of the dog rocker and the adjacent face of the stepping dog, said spring tending constantly to turn said dog on its pivot 23 away from the face of the dog rocker. Normally, however, the dog is maintained in contact with the face of the dog rocker by reason of the engagement of one of the teeth of the escapement wheel with said dog. The rear dog 19 is normally disengaged from the escapement wheel and `is what is commonly termed a holding dogbbeing rigidly secured to the dog rocker as' y a screw25. The ends of the shaft-like portion 21 of the dog rocker are depressed to receive the oints of adjustable screw pivots 26 whicii' are supported on a plate or bracket 27 depending from the under side of the to plate. The dog rocker spring (not shown normally maintains an adjustable limiting stop 28 in engagement with the bottom edge of the bracket 27. An adjustable limiting stop 29 on the vertically disposed ann of the dog rocker is 'adapted to contact with the rear face of the bracket 27 to limit the forward rocking movements of said dog rocker. A link 3() is pivotally connected at its up er end to the horizontal arm 22 of the dbg rocker and is part of a train of actuating devices (not shown) by which the dog rocker is operated from the printing keys. tVhen a rinting key or the space bar is depressed the ink 3() is pulled down, rocking the dog rocker and moving the stepping dog 18 forward out side of the rocker.

of the escapement wheel and bringing the holding dog 19 into engagement with the working face of thatv tooth 17 from which the stepping dog has just separated. As soon as the stepping dog disengages from the escapement wheel it will be swung away from the dog rocker by its spring 24 until arrested by its o wn extension or tail contacting with the On the return movement of the dog rocker the holding dog 19 moves backward out of the escapement wheel and the stepping dog 18 is brought into the path of saidwheel behind the previously engaged tooth, whereupon the' carriage will be moved forward a letter space under the pull of the lusual sprin drum (not shown).

A toothed stop bar 31 (Figs. 5-7) is pivoted at its ends on screw pivots 32 supported on lugs 33v rising from the upper fixe carriage rail 3. i' Adjustably mounted on the stop bar 31 at the left-hand side are stop members 34 and 35. The stop member at the righthand side of the machine is not shown. The member 3,4 carries a bell trip 36 and a stop proper 37 for the right-hand margin. The member 35 carries a stop proper 38,

usually termed the final margin stop.l As

shown in Fi 5 the member 35 is at the limit of its leftward movement along the stop bar 31, being in contact with a pin 31a fixed to and rising from the stop bar; while the stop member-34 is arranged at a plurality of letter space distances to the right of the member 35; (loperating with the bell trip 36 and the stopsproper 37 and 38 is a carria e sto 39 which is at the top of and integra wit the upright arm of a bell-crank ever 40 pivoted at 41 to the slide bar 5 and normally maintained by a spring 42 against a stop 43. The horizontal arm or bell-crank lever 40 carries aroller 44 which contacts with the u per edge' of a bail 45, said bail extending ongitudinally of the lower rail 3 at the front thereof, being provided with rearwardly bent end portions which receive pivot screws 46 su' ported in the ends of the oWer rail 3. A eaf spring 47 normally maintains the bail 45 in the position shown in Fig. 5. The bail carries a pin 48 which coperates with the tail 49 of a gravity locking hook 50 pivoted at 51 to the lower rail 3. The hook 50 is normally maintainedby the bail 45 in inoperative position as shown in Fig. 5` but when the bail is depressed the' y clamer usual way by the hammer (not shown;)' Thereafter said carriage stop will engage with the margin stop 37 and will be turned on its pivot until it engages with a backl stop 53 on the slide bar. During thisturnin movement the roller 44 will depress the bai 45 against its spring and iinally Willpermit the gravity locking hook to engage with the linger 52, thus locking.l the escapement at the same time that the carriage isfarrested because of the contact of the bell crank lever 40 with the'stop 53; ln order to release the carriage for further printing, the usual margin release key (not shown) may be operated to actuate the releasing devices, said releasing devices including a link 54A (Fig. 7)

having a pin and slot connection with they stop bar 31. When the margin release key is actu ated the link 54 will be pulled down, rocking the stop bar 31 on its pivots and lifting the stops at the front side of said bar, thus causing the stop 37 to be lifted from and to releasey the carriage stop 39, permitting the devices ior locking the escapement to be restored to normal osition by their springs. Thereafter additional characters may be written until the advance of the carriage brings the stop 39into contact with the iinal margin stop 38 and causes the bell crank 40 to be rocked onits pivot to the position shown in F ig. 6, with the result that the locking hook 50 will again be brought into operation to lock the escapement. At this time a stop 55, which is in the form of a lug projecting rearwardly from the slide bar 5, and which is one of the regular tabulator sto s, will have been brought into contact wit a stop 56 which is in the form of a screw adjustably mounted in the left-hand standard 2. Neither of the stops -55 and 56 is movable out oi the path of the other so thatwhen said stops engage, no further movement ofthe carriage towards the left is possible. By operating the margin release key at this time, however, the stop bar 31 may be rocked to disengage the iinal margin stop 38 from the carriage stop 39, permitting the carriage stop to return to normal position and causin the line locking hook 50 to release the lin 30. The result is that thereafter on the depression of a character key to print the iinal character, the dog rocker will be swung forward, releasing 'the stepping dog 18 and bringing the holding dog into engagement with the .escapement wheel; but on releasing the actuated character key, although the stepping dog will rent'er the plane of the esca ement wheel behind the tooth last engaged y saidy stepping dog, there will, nevertheless, be no movement of the carriage, since the latter has already reached the final limit of its movement.

if the ste ping dog i8 were provided withy an integral ack stop of the'usual construction, suchzas Ithatindicated ata (Fig: 49, thev relation of thestepping: dog and. back stop a.

with the' escapement wheelf at this time i would be that indicated at Fig. 4, so -thati if the carriage were now restored' from letty to- Y right until arrested and5 pressure thereon re moved, it would advancey two` letter space distances instead of only oneV letterfspace distance as it does ordinarily. whenrestored' from left tofri hti and the pressure of the operators hand removed; Unlessthisfdifferent point of starting' beV corrected before the writing. of lines isY begun an irregular left-hand margin would resulta It willfursther be understood that when; the ystep ing.

dog and backstop/are made yintegra as shown in Fig. 4- the manufacture is somee what complicated `and expensive, it beingI necessary to mill the stops to the required shape in rod orbars form'and then tosawfthe bar into pieces oi the desired thickness after-f which .two milling. operations are requiredfto complete-the blank. l

To obviate the defect in operation! above ointed out and to 4lessenk thecost et manu tacture, l dispense with the back stop aand' provide in lieu thereof a back stop member of the character now tobe described. Said stop member comprises a hub portion 57 pivoted on av screw 58 which isvthreadedlinto the right-hand side of the dog rocker arm20. Rising from the hub 57 is anarrn- 59 terminating at its top in a rearwardly extending locking linger or stop portion 59L which normally engages in one of a series of? cut-outsor notches i7a formed-between theteethiw of the escapement' wheei. The arm 59 is contiguous to the -face ofthe dog rocker arm 29 and normally engages with the same tace of the operative escapement Wheel tooth 17 with whichv the stepping dog 13- normally -l engages, the stop 5 9a engaging witlisaid face at a point above the dog i3 but inlthe'same foreand ait plane therewitl A wire spring' 60 is coiled around the hub 57 and, havingl one-end securedin the hub 57A and the otherend in the rocker, tends constantly to turn the aim 59 rearward on its pivot 58.-- Said arm isi-normally arrested by the iront iaceof' the lug 20'whicli serves-as a stop vfor the arm engaging with-acontact face 59') thereon and revents said arm from contacting withthe trent face oi the 'stepping dog i3, in which case it might interfere with'the'proper'opew ation of'said dog.

ln ordinary operation with my improvements in use, when the dog'rocker 4is rockedi forward the stepping dog i8 will swing away from the dog rocker so that on the return movement of said recker said ste ping dog will-engage with the next' succeedingtoothi if the stop 59a were rigid on the dcg'rocker itmight happen at times that duringreturn movements oi the rocker' said stop would liti vferred to of the dog rocker.

contact with the front face of the advancing tooth 17 so as to prevent the stepping dog from entering the .plane or path of the escapement wheel untilthe stop 59a entered the cut-out 17.a behind the advancing tooth. It might happen in such case'that the ste ping dog would not enter the plane of t e Wheel in time to prevent more than one tooth of the escapementwheel from escapement,

and that two or more teeth might esca e.'

My improved construction renders such efective operation impossible, for if duringthe vancing tooth 17., The onlyl result would be that the stop .59a would be momentarily held from movlngrearward and the. sprin O -60 would be flexed to permit uninterrupted movement of thedog rocker rearward. In

such case when the advancing tooth 17 had passed the. stop 59 the latter would be pressed into the following cut-out 17a by the s ring 60.

en a stop of my improved construction is employed and the carriage stop 39 and the final margin sto 38 are brought into the relation shown in ig. 6, at which time the stop 55 on the carriage engages the stop 56 on the frame, 'then the carriage will be finally arrested and the -escapement devices will be locked. Actuating the margin stop key will release the. escapement devices so that an additional character maybe printed and the dog rocker vibrated During the forward movement of the dog rocker the step ing dog will step one space, as illustrated in ig. 3, so that on the return movement of the dog rocker said stepping dog will pass behind the tooth 1.7 with which it had. previously engaged. Said tooth, however, will not have changed `its position owing to the non-movement ofthe carriage, so that the stop- 59a will enter the same cut-out 17 with whichit had engaged prior to the vibration just re- 'Ihe relation of the escapement wheel with the dog 18 and the stop 59a at vthis stage is illustrated' in Fig. 3. new the carriage be restored from left to right until arrested and the operator then removes pressure from'said carriage, the latter willi not move at all from its position of arrest. Furthermore under ordinary conditions as weli as under those just considered there vviii be no forward movement of the carriage after its restoration from left to right and arrest. Consequently the margin at the left-hand side of the written page will be uniform.` l v The construction provided by me is less expensive than that which it replaces; and

operates, as has been seen to overcome deby Letters Patent, is

y 1.v In a typewriting machine, the combination of a carriage, carriage feeding devices, devices including stops for locking said car'- riage and said carriage feeding devices 'from movement, means for releasing certain of said stops to unlock said carriage feeding devices without unlocking the carriage, andfa back stop cooperative with certain of said carriage feeding devices to always prevent stepping forward of the carriage after said carrlafe has heen returned and arrested at the right-hand margin position.

2v. In a typewriting machine, the com-bination of a carriage, carriage feeding devices, devices including stops for locking said carriage and said carriage feeding devices from movement, means for releaslng certain of said stops to unlock said carriage feeding devices without unlocking the carriage, and a back sto cooperative with certain of said carriage eeding devices to arrest the carriage when 1t is returned, after the subsequent actuation of a printing key, at the same starting point at which said back stop ordinarily operates to arrest said carriage.

3. In a typewriting machine, the combination of a carriage, carriage escapement devices including a toothed escapement wheel, devices including stops for locking said carriage and said escapement devices from -movement, means for releasing certain of said stops to unlock the escapement devices without unlocking the carriage, and a back stop cooperative with said toothed escapementwheel to arrest the carriage when it is returned, after the subsequent actuation of a printing key, at the saine starting point at which said back stop ordinarily operates to arrest said carriage. y

s. In a typewriting machine, the combination of a carriage carriage escapement devices including a toothed escapem-ent wheel, Ooperatin feed dogs and a dog rocker carrying said feed dog devices; means including stops for locking said lcarriage and said escapement devices from movement; means for releasing certain of said stops to unlock the escapernent devices without unlocking rocker 01' said back stop, said 1beck stop codagavand State of New York this 26th day of olamting with said toothed esoapement December A. D. 1908.

W es] to always prevenl stepping forward of the osnin e after said oerrage has been re- ERBERT H. STEELE.

5 turned am arrested at the right-hand margin Witnesses:

position. l -li/Inms. K. UNDERDOWN,

Signed at Syracuse, in the oountv of Onon- 1 BEssm G. KETTELL. 

